Screwpump Series ACD

Transcription

1 Screwpump Series ACD Product description Flow volume: l/min Max differential pressure: 7 bar Applications: Lubrication, circulation and transfer ACD 1116 GB IMO AB, Telephone: , Telefax:

2 The ACD pumps are used for a number of different fluids: Lubrication oil, fuel oil, vegetable oil, hydraulic oil and other hydraulic fluids, glycols, polymers, emulsions, and any nonaggressive fluid with some lubricating properties. Typical application are: Lubrication of diesel engines, gears, gas Applications Technical data and steam turbines, hydro turbines, paper machines. Circulation for cooling and filtration in large machineries and hydraulic systems, pumping transformer oil for insulation in transformers. Transfer onboard ships, in oil factories, refineries, tank farms etc. Discharge pressure Maximum discharge pressure is 12 bar Differential pressure Maximum differential pressure is 7 bar but is reduced at low viscosities as shown in the table below. Viscosity, mm2/s (cst) Max. diff. pressure (bar) 4,2 4,7 5,1 5,5 5,8 6,0 6,3 6,5 6,7 Inlet pressure Max. inlet pressure is 7 bar Min. inlet pressure is shown in the Selection guide Displacement cm3/r Size,lead 025L 025N Displacement cm 3 /r Pressure relief valve The pump is equipped with an integral pressure relief valve with internal return, limiting the differential pressure across the pump and protecting the pump should the discharge line be blocked. The valve is adjustable for different opening pressures. The value of the pressure limit can be set at the factory and should be adjusted at installation (see Installation & Startup instruction for Low pressure pumps). The valve has a pressure accumulation of max. 4 bar, so with moderate demands on pressure modulation, it may also be used for pressure regulation. The valve has a max. set pressure of 7 bar. Drive The pump is designed to be short coupled to an electrical motor IEC size 71. The motor bearing will have to carry a slight axial load from the rotor set. With motors delivered from IMO AB, this load will not significantly impair the bearing life expectancy. Max speed limit The maximum speed is 3600 rpm. For higher speeds contact IMO AB. Rotation The ACD pump is designed to operate in one rotational direction only, as standard clockwise when facing the shaft end. Fluid viscosity mm 2 /s. For higher viscosities contact IMO AB. Pumping temperature -20 C to 90 C for all types of ACD. Sound level A typical sound level from a pump with standard driver is 58 db(a). This value refers to free field conditions at 5 bar, 2940 rpm and 40 cst, measured according to ISO Standard and recommendation Version NTBP is recommended whenever the starting viscosity might exceed 800 cst. Unless otherwise specified, version IVBP will be delivered. 2 IMO AB, Telephone: , Telefax: ACD 1116 GB

3 Material and design IVBP NTBP Pump body Pearlitic cast iron Nodular cast iron Power rotor Steel, surface treated Steel, surface treated Idler rotors Pearlitic cast iron, Pearlitic cast iron, surface treated surface treated Shaft seal Carbon/Ni-resist Carbide/Carbide Viton elastomers Viton elastomers Viscosity table cst SSU 32,6 39,2 52,2 99, Units The following units are frequently used for specification of pumps: SI-unit IMO units USA units conversion Pressure Pa (MPa) bar psi 1 bar = 14,5 psi = 0,1 MPa Speed r/s rpm rpm 1 rpm = 0, r/s Viscosity mm2/s cst SSU see table Temperature C C F C = ( F-32)/1,8 Length m mm inch 1 mm = 0,0394 inch Flow rate m3/s lit/min GPM 1 lit/min = 0,264 GPM Pump model code Pump series ACD Size (Power rotor diameter, mm) Lead L=Low lead N=Normal lead Generation Design generation 6 Material in pump body I=Perlitic cast iron N=Nodular cast iron Shaft seal design V=Carbon/Ni-resist. elastomers in Viton T=Carbide/Carbide, elastomers in Viton Mounting B=Flange mounting Valve P=Pressure relief valve included Special design Code group omitted for standard design ACD 1116 GB IMO AB, Telephone: , Telefax:

4 Selection guide 50 Hz Size Visc. (lit/min) Speed: 1450 rpm Speed: 2900 rpm & Diff. pressure (bar) Min.inlet Diff. pressure (bar) Lead (cst) (kw) (bar)* Min.inlet (bar)* 20 Qeff Pe Qeff L Pe Qeff Pe Qeff Pe Qeff Pe Qeff N Pe Qeff Pe Qeff Pe * Valid for liquids free from unresolved air or gas. Selection guide 60 Hz Size Visc. (lit/min) Speed: 1750 rpm Speed: 3500 rpm & Diff. pressure (bar) Min.inlet Diff. pressure (bar) Lead (cst) (kw) (bar)* Min.inlet (bar)* 20 Qeff Pe Qeff L Pe Qeff Pe Qeff Pe Qeff Pe Qeff N Pe Qeff Pe Qeff Pe * Valid for liquids free from unresolved air or gas. 4 IMO AB, Telephone: , Telefax: ACD 1116 GB

5 Pump dimensions Pump ACD Dimensions in mm (The counter flanges are accessories) Fig. 1 Pump unit ACD Dimensions in mm (With standard electric motor) Fig. 2 ACD 1116 GB IMO AB, Telephone: , Telefax:

6 Accessories A bare shaft pump (fig. 3) can be ordered with the accessories in fig Fig. 4 Set of counter flanges Fig. 5 Angle bracket Fig. 3 Bare shaft pump Fig. 6 Double assembly unit The ACD-pump with counter flanges of the weld neck type is mounted directly to an electric motor and has an angle bracket for mounting horizontally, vertically or any other attitude. Two pump units can also be mounted to a double assembly on a common frame with inlet and outlet pipe Installation Fig. 7 Electric motor connections. The double assembly saves space and facilitates installation, maintenance, service and supervision. See Product Description for T4. For more information about installation read the Installation and Start-up manual for low pressure pumps. Spare parts for these pumps are easily available from stock. For detailed information and know-how about service read the Maintenance and Service Maintenance and Service instruction for ACD-pumps or contact IMO AB. 6 IMO AB, Telephone: , Telefax: ACD 1116 GB

7 ACD 025, all models Sectional view flow out flow in A Fig. 8 Pos No List of components Denomination Pos No Denomination 1020 Power rotor 134 Locking screw 162 Nylon sleeve socket 202 Idler rotor 401 Pump body 443 Drip nipple 451 Screw 501 Front cover 506 O-ring 509 Shaft seal 551 Rear cover 556 Gasket 601 Valve cover 602 Sealing washer 605 O-ring 612 Regulating screw 612A Retaining ring 614 Valve piston 615 Valve spring ACD 1116 GB IMO AB, Telephone: , Telefax:

8 IMO AB: P.O. Box 42090, S STOCKHOLM, Sweden. Telephone: Telex: IMO S, Telefax: , 8 IMO AB, Telephone: , Telefax: ACD 1116 GB